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  1. Earth

    North and South: Equal melting from each hemisphere raised ice age sea levels

    The gargantuan volumes of meltwater that boosted sea levels during the most recent round of ice ages derived equally from ice sheets in the Northern and Southern Hemispheres.

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  2. Ringing Out Despair: Phone therapy gets call as depression buster

    Psychotherapy delivered over the telephone shows promise as a depression treatment when offered in conjunction with prescribed antidepressant medication.

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  3. Astronomy

    Super Portrait: X-ray telescope eyes supernova remnant

    Trained on Cassiopeia A for 11.5 days, NASA's Chandra X-ray Observatory has taken the most detailed portrait ever recorded of any supernova remnant.

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  4. Earth

    Rounding Up Resistance: Weed sacrifices seeds to put up with a herbicide

    Use of herbicides containing glyphosate can drive evolution in the tall morning glory, even though the weed must simultaneously sacrifice a measure of its fertility.